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  Partner: UNT Libraries Government Documents Department
 Serial/Series Title: NACA Technical Memorandums
 Collection: National Advisory Committee for Aeronautics Collection
Load assumptions for calculating the strength of airplanes

Load assumptions for calculating the strength of airplanes

Date: September 1, 1930
Creator: unknown
Description: The following load assumptions shall be taken as the basis of the strength calculations. Certain definite load conditions (e.g. of flight, control, landing and transport) shall be assumed. The loads shall be assumed to be safe loads, constant or only slowly variable, and the inertia forces due to elastic deformation are accordingly disregarded. The external forces, the force of gravity and the inertia forces on the whole airplane shall produce a condition of equilibrium.
Contributing Partner: UNT Libraries Government Documents Department
Replacing the weight of materials consumed on airships

Replacing the weight of materials consumed on airships

Date: June 1, 1923
Creator: Crocco, G A
Description: Two methods to replace the weight of gas lost on long airship flights are discussed: condensing the water of combustion and thermic sustentation. In the present article we will discuss the first method, leaving the second to be examined in a subsequent article.
Contributing Partner: UNT Libraries Government Documents Department
Eleventh Rhon soaring-flight contest, 1930

Eleventh Rhon soaring-flight contest, 1930

Date: June 1, 1931
Creator: Georgii, Walter
Description: This report presents the results and a recounting of the new technological developments that were developed for the 11th Rhon Soaring Contest.
Contributing Partner: UNT Libraries Government Documents Department
Development of tailless and all-wing gliders and airplanes

Development of tailless and all-wing gliders and airplanes

Date: April 1, 1932
Creator: Lademann, Robert W E
Description: Tailless airplanes are characterized by having all their control surfaces, especially the elevator, incorporated in the wings. This paper provides a discussion of the history of their development and current state of development.
Contributing Partner: UNT Libraries Government Documents Department
Building a full-size glider

Building a full-size glider

Date: September 1, 1927
Creator: Camm, F J
Description: The building and flying of a glider is possible for anyone who can use a few basic tools. This report presents some plans and techniques for building your own glider.
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The vector ruling protractor

The vector ruling protractor

Date: March 1, 1924
Creator: Zahm, A F
Description: The theory, structure and working of a vector slide rule is presented in this report. This instrument is used for determining a vector in magnitude and position when given its components and its moment about a point in their plane.
Contributing Partner: UNT Libraries Government Documents Department
Unsymmetrical forces in an airplane cell

Unsymmetrical forces in an airplane cell

Date: November 1, 1929
Creator: Vogt, R
Description: This paper calls attention to the desirability of expanding airplane building regulations to include proof of safety for cases of unsymmetrical loading, at least in the structural members which are thereby specially stressed.
Contributing Partner: UNT Libraries Government Documents Department
Effects of streamline curvature on lift of biplanes

Effects of streamline curvature on lift of biplanes

Date: June 1, 1927
Creator: Prandtl, L
Description: This report concerns, first, the determination of the lift of a wing which is situated in a curvilinear flow; and second, to calculate the curvature which one wing of a biplane produces in the vicinity of the other.
Contributing Partner: UNT Libraries Government Documents Department
Ultra-light alloys and their utilization on aircraft

Ultra-light alloys and their utilization on aircraft

Date: May 1, 1924
Creator: Defleury, R & Portevin, A M
Description: We will arbitrarily call alloys having a specific gravity of less than 2 "ultra-light", in order to distinguish them from "light" alloys with a specific gravity of 2 to 3. Thus far it has been possible to make ultra-light alloys only by employing a large proportion of magnesium.
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A study of curvilinear flight

A study of curvilinear flight

Date: April 1, 1931
Creator: Kruse, Helmuth
Description: When an airplane describes a curve it takes a certain time for it to turn from level to inclined position and then back to level again. In the following, we express the motion about the horizontal axis as "roll" or "bank" and the motion perpendicular to the vertical axis, i.e., the actual curve, as "turn." Equations and tables provide results on various aspects of turns, control settings, acceleration, inertia moments, and angular velocity.
Contributing Partner: UNT Libraries Government Documents Department